Circulating fluid washer



' sept' 29; 1942- J. s.' PAGE CIRGULATING FLUID WASHER M. W L G mam w YJ FiledV May l5, 1940 Il .Il

` v/1 T Ton/Vix Patented Sept.` 29,` 1942 t UNITED STATES' PATENT OFFICE mmm'tm ...m

John S. Page, Long Beach, Calif.

Application May 15, 1940, Serial No. 335,298

2 Claims. (Cl. 16B-20) This invention relates to a circulating iiuid washer, particularly applicable to the cleaning of casing or perforations in the casing of an oil well.

An object of my invention is to provide a novel circulating fluid washer in which the motor and pump are a part of the tool which is run into the well, the pump being adapted to pick up fluid from within the casing and force this fluid under pressure between spaced packers and through the perforations in the wall of the casing.

Another object of my invention is to provide a novel circulating fluid washer provided with a by-pass around the packers so that the tool will move into and out of the casing with a minimum of effort.

Another object is to provide a novel circulating uid washer of the character stated, provided with a novel pressure releasing means so that the spaced packers on the tool will not be injured due to excessive pressure of the uid which may be forced between them.

A feature of my invention is to provide a novel contact means for the electrical conduit, which is engageable with the electrical plug after the tool has been run into the well.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description, and the appended claims.

In the drawing:

Figure 1 is a side elevation of my circulating fluid washer with parts broken away to show interior construction.

Figure 2 is a fragmentary, longitudinal, s ectional view of the lower portion of my washer.

Figure 3 is a fragmentary, longitudinal, sectional view of the upper portion of the washer, including the electrical contacting means AFwhich is shown in disengaged position.

Referring more particularly to the drawing, the numeral I indicates the usual oil well casing, into which my fluid washer may be run. A part of this casing may be perforated as shown at 2. through which oil flows into the casing from the formation. These holes frequently become clogged with various 'materials and it is, therefore, necessary to clean them. My circulating iiuid washer comprises an upper collar 3, into which .the drill pipe 4 is threaded. An electrical motor 5 is attached to the collar 3, and this motor is of usual and well-known design and the details thereof form no part of this invention.

this pump has intake ports 1, through which fluid passes into the pump, and an outlet pipe 8, which extends downwardly from the pump. A collar 9 screws onto the lower end of the pipe 8, and this collar also screws onto the upper end of a tting III. A packer II is fixedly mounted on the fitting I il, substantially in the manner disclosed in Figure 2. A second fitting I2 is spaced below the ntting I0, and a second packer I3 is mounted on the fitting I2 in the same manner as the packer II is mounted on the ntting I0. A conduit I4 connects the ttings III and I2, preferably by threading these ttings into the ends of the conduit.

A tube I5 extends through the fitting I0 and is threaded into the upper end ofthe conduit I4. A packing gland I6 seals the upper end of the pipe I5 within the fitting I0. A second pipe I'I is threaded into the lower end of the conduit I I, and extends through the fitting I2. A packing gland I8 surrounds the pipe I1 to prevent leakage around this pipe within the fitting I2. From the structure thus far described, it will be evident that a continuous passage is provided longitudinally through the washer from top to bottom, this passage being through the pipes I5, I'I and the conduit Il. I'he conduit I4 is provided with a plurality of laterally extending holes I9. ,These holes are arranged between the packers Il, I3 and iiuid from the pump 6 is forced downwardly through the connector pipe 3, thence through the pipe I 5, and thence out of the holes I9 under considerable pressure, so that the perforations 2 in the casing may be washed or cleaned.

A foot plug 20 screws onto the lower end of the fitting I2, and a spring loaded, upwardly pressed valve 2| is seated in the foot 20, normally closing the bottom of the tool against the ow of fluid. an outlet 'for the fluid if the valve 2| is unseated due to excessive pressure which might be built up by the pump within the tool. When the tool is run on drill pipe, it might be desirable to rst position the tool in the well and afterwards lower the electrical conduit. However, my tool may be run on a cable and in that event the conduit does not necessarily have to be of the detachable type, as hereinafter described.

A multiple contact plug 23 is fixedly mounted at the upper end of the tool, and as here shown, is within the collar 3. A' socket 24 is of the slip type, and has a pluralityv of contacts to engage the plug 23. 'Ihe electrical cable 25 is attached A pump 6 is mounted below the motor 5, and 55 to the socket 24. and extends upwardly to the Relief ports 22 in the foot 20 provide move.

surface of the ground. The socket 2l is of sufficient weight so that it will travel downwardly within the drill pipe l, and will slide onto the plug 23 and make contact therewith. The plug 23 is electrically connected to the motor l, and current is thus supplied to this motor to actuate the same. With this arrangement, the electrical conduit can be run into the well after the tool is in position, and also can be removed from the well before the tool is moved.

When the tool is moving into or out of the casing I,it is desirable to by-pass uid around the packers I I, I3 so that the tool will readily 'I'his fluid by-pass includes a plurality of radial ports 26 in the tting' I0, which communlcate with an annular chamber 21 surrounding the pipe I5. 'I'he tting I2 is similarly provided with a plurality of ports 28, which communicate with the annular chamber 29 surrounding the pipe I'I. The chambers 21 and 29 both extend into the conduit Il, and a. plurality of bores 30 extend longitudinally through the conduit Il, thus permitting iluid to pass from the ports 26 to the ports 28, by-passlng the packers II and I 3. It will be evident that iluid can flow in either direction through the ports, and annular chambers, as previously described.

In operation, the tool is rst lowered to the point desired in the casing I, and thereafter the motor 5 is started either by dropping the electrical cable 25 into the well to contact the plug 23, or if the electrical cable is flxedly attached, a switch is thrown to close the electrical connection to the motor. The motor 5 drives the pump 6, which picks up uid already in the casing through the intake port 'I, and forces this fluid under pressure downwardly through the connecter pipe 8, thence through the pipe I5, and ,out of the ports I9 between the packers II and I3. 'I'his iluid under pressure is then forced s through the perforations v2 to eifectively clean the same. If an excessive pressure is built up,

the valve 2| will be unseated, thus permitting fluid to pass out through the relief ports 22.

Y A relief duct 24a extends through the wall oi the socket 24 for the purpose of permitting fluid to be forced out of the socket when the plug enters the same.

Having described my invention, I claim:

1. A circulating iluid washer comprising an elongated hollow body, a packer mounted on the body, said body having an outlet port below the packer through which iluid under pressure may be forced, a pump means mounted above the body, the outlet of said pump opening into the body, an electric motor mounted above the pump, an electrical plug mounted above the motor, electrical conductors extending from the plug to the electric motor, and an electrical slip socket engageable withv the plug, an electrical cable to which the slip socket is connected, the washer being suspended on pipe through which the socket moves to engage the plug, said socket engaging the plug after the washer is in operative position.

2. A circulating uid washer comprising an elongated hollow body, a pair of spaced packers mounted on the body, said body having an outlet port between the packers through which fluid under pressure may be forced, a pump mounted on the body and adapted to force fluid under pressure into the body, and electric motor mounted above the pump and operatively connected thereto, said body having a fluid by-pass therein extending from below the lower packer to above the upper packer, an electrical plug above the motor, electrical conductors extending from the plug to the electric motor, an. electrical slip socket engageable with the plug, said socket being mounted on and connected to an electrical cable, the. washer being suspended on a pipe through which the socket is movable to engage the plug, said socket engaging the plug after the washer is in operative position.

JOHN S. PAGE. 

